Conjugación del verbo inglés
CAN COUNTERSIGN

Verbo regular: countersign - countersigned - countersigned

Afirmación

Forma simple	Forma con V-ing
I can countersign you can countersign he can countersign we can countersign you can countersign they can countersign	I can be countersigning you can be countersigning he can be countersigning we can be countersigning you can be countersigning they can be countersigning
Perfecto	Perfecto con V-ing
I can have countersigned you can have countersigned he can have countersigned we can have countersigned you can have countersigned they can have countersigned	I can have been countersigning you can have been countersigning he can have been countersigning we can have been countersigning you can have been countersigning they can have been countersigning

Negación

Forma simple	Forma con V-ing
I cannot countersign you cannot countersign he cannot countersign we cannot countersign you cannot countersign they cannot countersign	I cannot be countersigning you cannot be countersigning he cannot be countersigning we cannot be countersigning you cannot be countersigning they cannot be countersigning
Perfecto	Perfecto con V-ing
I cannot have countersigned you cannot have countersigned he cannot have countersigned we cannot have countersigned you cannot have countersigned they cannot have countersigned	I cannot have been countersigning you cannot have been countersigning he cannot have been countersigning we cannot have been countersigning you cannot have been countersigning they cannot have been countersigning

Forma interrogativa

Forma simple	Forma con V-ing
can I countersign? can you countersign? can he countersign? can we countersign? can you countersign? can they countersign?	can I be countersigning? can you be countersigning? can he be countersigning? can we be countersigning? can you be countersigning? can they be countersigning?
Perfecto	Perfecto con V-ing
can I have countersigned? can you have countersigned? can he have countersigned? can we have countersigned? can you have countersigned? can they have countersigned?	can I have been countersigning? can you have been countersigning? can he have been countersigning? can we have been countersigning? can you have been countersigning? can they have been countersigning?

Forma interro-negativa

Forma simple	Forma con V-ing
can I not countersign? can you not countersign? can he not countersign? can we not countersign? can you not countersign? can they not countersign?	can I not be countersigning? can you not be countersigning? can he not be countersigning? can we not be countersigning? can you not be countersigning? can they not be countersigning?
Perfecto	Perfecto con V-ing
can I not have countersigned? can you not have countersigned? can he not have countersigned? can we not have countersigned? can you not have countersigned? can they not have countersigned?	can I not have been countersigning? can you not have been countersigning? can he not have been countersigning? can we not have been countersigning? can you not have been countersigning? can they not have been countersigning?